Frequencies for sourcename variable in network2017 dataset :

Source Name |      Freq.     Percent        Cum.
------------+-----------------------------------
       HIOS |        397       42.46       42.46
        OPM |         23        2.46       44.92
      SERFF |        515       55.08      100.00
------------+-----------------------------------
      Total |        935      100.00

by Jean Roth , jroth@nber.org , 8 Dec 2017